3 questions...

[MSB]

When people say S.P.Q.R they are referring to the playable faction Senatus Popularisquo Romanus a.k.a. The Unified Roman Faction. EB has merged the Roman factions into one (no senate providing missions, no civil war etc.)

The senate is dead in EB. You do, however, as the Roman faction effectively play as the senate because the Roman faction represents the senate.

Not very clear I know, but I hope this helps you understand a little better.

And the Greek voice mod is for the battle map only. It only effects unit replies to your orders and not the general's speech. I believe the same is true for the Latin voice mod, the Carthaginian voice mod, the Celtic voice mod and the Eastern voice mod.